S-93298A125 5/16"-24 Flange Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking with durable nylon insert that maintains secure fastening under dynamic loads
• Enhanced bearing surface from 0.68" flange diameter distributes load evenly and prevents surface damage
• High-temperature performance with nylon insert rated for temperatures up to 250°F (121°C)
• Superior corrosion protection through zinc plating that extends service life in harsh environments
• Precision UNF fine threading (5/16"-24) with Class 2B fit ensures reliable engagement and consistent torque values
• Easy installation and removal with standard external hex drive compatible with common wrench tools
• Grade F strength classification provides mechanical reliability for demanding industrial applications

Professional Applications & Engineering Value

This nylon insert flange lock nut combines multiple engineering advantages to solve critical fastening challenges in industrial environments. The zinc-plated steel construction offers excellent corrosion resistance while maintaining Grade F mechanical properties. The integrated flange eliminates the need for separate washers, reducing assembly time and component count. The nylon insert locking mechanism provides consistent vibration resistance without damaging mating threads, making it ideal for machinery, automotive assemblies, and equipment subjected to continuous motion. The UNF fine thread configuration (5/16"-24) ensures precise adjustment and secure fastening in applications where vibration loosening is a concern. With its 250°F temperature rating, this lock nut maintains performance in elevated temperature environments where plastic inserts typically fail.

Specification Summary & Compliance

This flange lock nut features 5/16"-24 UNF fine threads with Class 2B thread fit for precision engagement. The right-hand thread direction follows standard industrial conventions. Manufacturing complies with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives, ensuring environmental compliance. The nut meets Grade F strength classification requirements, providing reliable performance in demanding applications. Physical dimensions include 0.68" flange diameter, 0.05" flange thickness, 1/2" width across flats, and 11/32" height for standardized installation.